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|
use rand::Rng;
use std::io::Read;
mod util;
#[test]
fn problem_25() {
let key = util::random_aes_128_key();
let nonce: u64 = rand::thread_rng().gen();
let plaintext = util::read("data/25.txt");
let ciphertext = matasano::aes_128_ctr(&plaintext[..], &key[..], nonce);
let edit = |ciphertext: &[u8], offset: usize, newtext: &[u8]| {
let block_start_number = offset / 16;
let block_start = block_start_number * 16;
let block_end_number = (offset + newtext.len() - 1) / 16;
let block_end =
std::cmp::min((block_end_number + 1) * 16, ciphertext.len());
let mut plaintext = matasano::aes_128_ctr_with_counter(
&ciphertext[block_start..block_end],
&key[..],
nonce,
(offset / 16) as u64,
);
for i in 0..newtext.len() {
plaintext[offset - block_start + i] = newtext[i];
}
let new_ciphertext = matasano::aes_128_ctr_with_counter(
&plaintext[..],
&key[..],
nonce,
(offset / 16) as u64,
);
return ciphertext
.iter()
.take(block_start)
.chain(new_ciphertext.iter())
.chain(ciphertext.iter().skip(block_end))
.map(|x| *x)
.collect();
};
let got =
matasano::crack_aes_128_ctr_random_access(&ciphertext[..], edit);
assert_eq!(&got[..], &plaintext[..]);
}
#[test]
fn problem_26() {
let key = util::random_aes_128_key();
let nonce = rand::thread_rng().gen();
let prefix = "comment1=cooking%20MCs;userdata=";
let suffix = ";comment2=%20like%20a%20pound%20of%20bacon";
let admin = ";admin=true;";
let escape = |input: &str| {
input
.replace("%", "%25")
.replace(";", "%3B")
.replace("=", "%3D")
};
let encode = |input: &str| -> Vec<u8> {
let plaintext: Vec<u8> = prefix
.as_bytes()
.iter()
.chain(escape(input).as_bytes().iter())
.chain(suffix.as_bytes().iter())
.map(|x| *x)
.collect();
return matasano::aes_128_ctr(&plaintext[..], &key[..], nonce);
};
let verify = |ciphertext: &[u8]| -> bool {
let plaintext = matasano::aes_128_ctr(ciphertext, &key[..], nonce);
return (0..(plaintext.len() - admin.len())).any(|i| {
plaintext
.iter()
.skip(i)
.zip(admin.as_bytes().iter())
.all(|(&c1, &c2)| c1 == c2)
});
};
let ciphertext = matasano::crack_ctr_bitflipping(&encode);
assert!(verify(&ciphertext[..]));
}
#[test]
fn problem_27() {
let key = util::random_aes_128_key();
let iv = key;
let prefix = "comment1=cooking%20MCs;userdata=";
let suffix = ";comment2=%20like%20a%20pound%20of%20bacon";
let admin = ";admin=true;";
let escape = |input: &str| {
input
.replace("%", "%25")
.replace(";", "%3B")
.replace("=", "%3D")
};
let encode = |input: &str| -> Vec<u8> {
let plaintext: Vec<u8> = prefix
.as_bytes()
.iter()
.chain(escape(input).as_bytes().iter())
.chain(suffix.as_bytes().iter())
.map(|x| *x)
.collect();
return matasano::encrypt_aes_128_cbc(
&plaintext[..],
&key[..],
&iv[..],
);
};
let verify = |ciphertext: &[u8]| -> Result<bool, Vec<u8>> {
let plaintext =
matasano::decrypt_aes_128_cbc(ciphertext, &key[..], &iv[..])
.unwrap();
if plaintext.iter().any(|&c| c < 32 || c > 126) {
return Err(plaintext);
} else {
return Ok((0..(plaintext.len() - admin.len())).any(|i| {
plaintext
.iter()
.skip(i)
.zip(admin.as_bytes().iter())
.all(|(&c1, &c2)| c1 == c2)
}));
}
};
let ciphertext = matasano::crack_cbc_iv_key(&encode, &verify);
assert!(verify(&ciphertext[..]).unwrap());
}
// problem 28 is just matasano::sha1_mac
#[test]
fn problem_29() {
let key: Vec<u8> = rand::thread_rng()
.sample_iter(&rand::distributions::Standard)
.take(::rand::thread_rng().gen_range(5, 25))
.collect();
let valid_input = b"comment1=cooking%20MCs;userdata=foo;comment2=%20like%20a%20pound%20of%20bacon";
let valid_mac = matasano::sha1_mac(valid_input, &key[..]);
let possibles = matasano::crack_sha1_mac_length_extension(
valid_input,
valid_mac,
b";admin=true",
);
assert!(possibles
.iter()
.all(|&(ref input, _)| input.ends_with(b";admin=true")));
assert!(possibles.iter().any(
|&(ref input, ref mac)| &matasano::sha1_mac(&input[..], &key[..])[..]
== &mac[..]
));
}
#[test]
fn problem_30() {
let key: Vec<u8> = rand::thread_rng()
.sample_iter(&rand::distributions::Standard)
.take(::rand::thread_rng().gen_range(5, 25))
.collect();
let valid_input = b"comment1=cooking%20MCs;userdata=foo;comment2=%20like%20a%20pound%20of%20bacon";
let valid_mac = matasano::md4_mac(valid_input, &key[..]);
let possibles = matasano::crack_md4_mac_length_extension(
valid_input,
valid_mac,
b";admin=true",
);
assert!(possibles
.iter()
.all(|&(ref input, _)| input.ends_with(b";admin=true")));
assert!(possibles.iter().any(
|&(ref input, ref mac)| &matasano::md4_mac(&input[..], &key[..])[..]
== &mac[..]
));
}
#[test]
#[ignore]
fn problem_31() {
let exe_path = std::env::current_exe().unwrap();
let exe_dir = exe_path.parent().unwrap().parent().unwrap();
let server_bin = exe_dir.join("timing_attack");
let (ready_w, ready_r) = std::sync::mpsc::channel();
let (kill_w, kill_r) = std::sync::mpsc::channel();
std::thread::spawn(move || {
let mut child = std::process::Command::new(server_bin)
.args(&["50"])
.stdout(std::process::Stdio::piped())
.spawn()
.unwrap();
let mut key = [0u8; 32];
let _ = child.stdout.as_mut().unwrap().read_exact(&mut key);
ready_w.send(key).unwrap();
let _ = kill_r.recv();
child.kill().unwrap();
child.wait().unwrap();
});
let key = hex::decode(ready_r.recv().unwrap()).unwrap();
let file = "filename.txt";
let got = matasano::crack_hmac_timing_basic(file, |guess| {
let mut params = std::collections::HashMap::new();
params.insert("file", file.to_string());
params.insert("signature", guess.to_string());
let res = reqwest::get(&format!(
"{}{}",
"http://localhost:9000/?",
matasano::create_query_string(¶ms)
))
.unwrap();
let status = res.status();
status.is_success()
});
let expected = matasano::sha1_hmac(file.as_bytes(), &key);
assert_eq!(got, expected);
kill_w.send(()).unwrap();
}
#[test]
#[ignore]
fn problem_32() {
let exe_path = std::env::current_exe().unwrap();
let exe_dir = exe_path.parent().unwrap().parent().unwrap();
let server_bin = exe_dir.join("timing_attack");
let (ready_w, ready_r) = std::sync::mpsc::channel();
let (kill_w, kill_r) = std::sync::mpsc::channel();
std::thread::spawn(move || {
let mut child = std::process::Command::new(server_bin)
.args(&["5"])
.stdout(std::process::Stdio::piped())
.spawn()
.unwrap();
let mut key = [0u8; 32];
let _ = child.stdout.as_mut().unwrap().read_exact(&mut key);
ready_w.send(key).unwrap();
let _ = kill_r.recv();
child.kill().unwrap();
child.wait().unwrap();
});
let key = hex::decode(ready_r.recv().unwrap()).unwrap();
let file = "filename.txt";
let got = matasano::crack_hmac_timing_advanced(file, |uri| {
let res = reqwest::get(uri).unwrap();
res.status().is_success()
});
let expected = matasano::sha1_hmac(file.as_bytes(), &key);
assert_eq!(got, expected);
kill_w.send(()).unwrap();
}
|
